JP4019026B2 - Work machine - Google Patents

Description

  The present invention relates to a work machine having a work device provided with a hydraulic piping system including a flexible hose.

  The piping guide prevents the slack of the flexible hose located between the boom and the stick in the excavator working device from falling down when the stick moves up and down with respect to the boom. There is one that prevents damage (see, for example, Patent Document 1).

On the other hand, in the small swivel type excavator shown in FIG. 4, it is necessary to raise the boom 3 a of the work device 3 pivotally supported in the concave portion 2 of the machine body 1 so as to be pivotable in the vertical direction to just above the machine body 1. Therefore, the boom rotation angle increases between when the boom is fully raised and when it is lowered, and accordingly, as shown in FIG. 5, the side surface of the boom from the pipe connection plate 5 positioned on the control valve 4 on the fuselage 1 side. The slack portion of the flexible hose 7 disposed over the pipe connection plate 6 is also increased. The control valve 4 and the fuel tank 8 disposed on the rear side of the control valve 4 are covered with a tank cover 9 shown in FIG.
Japanese Utility Model Publication No. 5-77346 (first page, FIG. 1)

  When the slack portion of the flexible hose 7 becomes large when the boom is fully raised, the slack portion falls to the boom 3a side and is sandwiched between the body 1 and the boom 3a. When the slack portion of the flexible hose 7 falls to the fuel tank 8 side and the tank cover 9 is opened, the slack portion of the flexible hose 7 interferes with the tank cover 9.

  The present invention has been made in view of such points, and when the working device moves along the opening of the concave portion of the airframe, the slack portion of the flexible hose is sandwiched between the airframe and the working device, An object of the present invention is to provide a work machine that does not interfere with members on the airframe side located around the recess.

According to the first aspect of the present invention, an airframe having a recess having an opening, and at least a part thereof is located in the recess of the airframe, and a base end is pivotally supported along the opening of the recess. Working device having a hydraulic piping system including a hydraulic hose and a flexible hose for supplying hydraulic oil to the hydraulic actuator, and a side region of the working device along the opening of the concave portion of the fuselage. A hose restricting body, and a hose restricting body that is formed in a part of the frame and that inserts the flexible hose into the frame. A hose insertion opening, and a mounting leg provided integrally with the frame and fixing the frame to the machine body. The opening of the recess of the machine is formed elongated in the front-rear direction of the machine, and the hose insertion opening is The front end of the frame disposed along the opening of the recess The mounting leg is provided on the working device side, and the mounting leg is formed by bending one end of the front end of the frame body downward, and a hose with respect to the first mounting leg. A second attachment leg formed by bending the other end of the frame downward through the insertion opening, and at least one third attachment integrally provided on the rear end of the frame And the first and second mounting legs are work machines fixed to a pipe connection plate that pipe-connects the flexible hose, and the first and second mounting legs are a frame. The frame is easily formed by bending the body, and the frame body is stably fixed by these attachment leg portions and at least one third attachment leg portion. Moreover, since the 1st and 2nd attachment leg part located through a hose insertion opening part was fixed to the piping connection board which pipe-connects a flexible hose, a flexible hose is a hose insertion opening part. It will be located in the place where it is hard to loosen, and there is no possibility that the slack portion of the flexible hose will come off the hose insertion opening to the outside of the frame.

According to a second aspect of the present invention, the machine body and the work device in the work machine according to the first aspect form a small swing type hydraulic excavator, and a control valve unit and a tank for controlling a hydraulic actuator along an opening of a concave portion of the machine body A tank cover that can be opened and closed is provided so that the flexible hose has a large slack when the working device is fully raised in a small swing type hydraulic excavator. The slack portion of the hose moves while being restricted by the side surface area of the working device along the opening of the concave portion of the airframe by the hose restricting body, and does not fall down to the working device side. In contrast, since the tank cover does not fall down to the tank cover side, it does not interfere with the tank cover when the tank cover is opened.

According to the first aspect of the present invention, when the working device moves along the opening of the concave portion of the airframe , even if a slack portion is generated in the flexible hose of the hydraulic piping system, the slack portion of the flexible hose is Since the hose restricting body moves in the side area of the working device along the opening of the concave portion of the machine body, it is possible to prevent the possibility of being caught between the machine body and the working device, and conversely, it is positioned around the opening of the concave portion. The possibility of interference with a member on the machine body side to be prevented can be prevented, damage to the flexible hose can be prevented, and smooth movement can be ensured. Furthermore, with respect to the hydraulic piping system including the flexible hose attached to the work device, the frame body is attached so that the flexible hose is relatively inserted into the frame body later from the hose insertion opening, and the mounting leg is attached. Since it fixes to the body side with a part, it is not necessary to remove a flexible hose, and workability | operativity can be improved. In particular, the first and second mounting legs can be easily formed by bending the frame, and the frame can be stably fixed by these mounting legs and at least one third mounting leg. it can. Moreover, since the 1st and 2nd attachment leg part located through a hose insertion opening part was fixed to the piping connection board which pipe-connects a flexible hose, a flexible hose is a hose insertion opening part. It will be located in the place where it is hard to slack, and it can prevent a slack part of a flexible hose coming off to the exterior of a frame from a hose insertion opening.

According to the second aspect of the present invention, in the small swivel type hydraulic excavator, even when a large slack portion is generated in the flexible hose when the working device is in the maximum raised state, the slack portion of the flexible hose is Since the hose restricting body moves while being regulated by the side area of the working device along the opening of the concave portion of the machine body and does not fall down to the working device side, the slack portion of the flexible hose is between the machine body and the working device. Can be prevented, and on the contrary, the tank cover does not fall into the tank cover side, so that it is possible to prevent the tank cover and the slack portion of the flexible hose from interfering when the tank cover is opened.

  Hereinafter, the present invention will be described in detail with reference to the embodiment shown in FIGS.

  As shown in FIG. 1, a hydraulic excavator as a work machine includes a lower traveling body 11 having a pair of crawler belts 11 a and an upper revolving body 12 provided so as to be able to swivel with respect to the lower traveling body 11. 13 is configured.

  A recess 16 is formed between the cab 14 on one side and the tank accommodating portion 15 on the other side of the upper swing body 12 constituting the machine body 13. The recess 16 has an arcuate opening that is elongated in the front-rear direction of the body 13. At least the lower part of the working device 17 is inserted into the recess 16, and the base end portion of the working device 17 is pivotally supported so as to be rotatable along the opening of the recess 16.

  In the work device 17, a lower boom member 22 constituting an offset boom 21 is pivotally supported with respect to the upper swing body 12 so as to be rotatable in the vertical direction, and the upper boom member 23 constituting the offset boom 21 is rotated in the left-right direction relative to the lower boom member 22. A cylinder support member 24 at the tip of the boom that constitutes the offset boom 21 is pivotally supported by the upper boom member 23 so as to freely move in the left-right direction, and the stick 25 is rotated in the front-rear direction by the cylinder support member 24. The bucket 26 is pivotally supported by the stick 25 so as to be freely pivoted.

  Further, the working device 17 includes a boom cylinder 27 as a hydraulic actuator that rotates the lower boom member 22 in the vertical direction, and an offset cylinder (shown in the figure) as a hydraulic actuator that offsets the upper boom member 23 and the cylinder support member 24. 2), a stick cylinder 28 as a hydraulic actuator for rotating the stick 25, and a bucket cylinder 30 as a hydraulic actuator for rotating the bucket 26 via a bucket linkage 29. A hydraulic piping system including a flexible hose 31 for supplying hydraulic oil is provided.

  A hose restricting body 32 that restricts the flexible hose 31 of the working device 17 to the side region of the working device 17 along the opening of the recess 16 of the working body 13 is attached to the body 13.

  The machine body 13 and the work device 17 form a small turning type hydraulic excavator with a small turning diameter by the circular planar shape of the upper turning body 12, the offset boom 21, and the like.

  As shown in FIG. 2, the recess 16 of the airframe 13 is formed by a pair of bracket plates 33 that pivotally support the lower boom member 22 and the boom cylinder 27. Inside the tank accommodating portion 15 arranged on the side, a control valve unit 34 for controlling the hydraulic actuator and a fuel tank 35 as a tank are accommodated.

  The control valve unit 34 is attached to the revolving frame 36 via a control valve mounting plate 37. Further, the control valve mounting plate 37 is extended above the control valve unit 34, and a pipe connection plate 38 is integrally provided. The lower end portion of each flexible hose 31 is connected to the fixed pipe 39 by the pipe connection plate 38, and the fixed pipe 39 is connected to each port of the control valve unit 34. Note that only a part of the fixed pipe 39 is illustrated.

  The upper end portion of each flexible hose 31 is connected to the hydraulic piping 42 for the offset cylinder, the stick cylinder 28 and the bucket cylinder 30 by a piping connection plate 41 attached to the side surface of the lower boom member 22.

  The fuel tank 35 is attached to the revolving frame 36 via a tank attachment plate 43. An engine (not shown) is disposed behind the fuel tank 35, and a fire prevention firewall 44 is disposed around the engine.

  As shown in FIG. 1, a tank cover 45 that covers the control valve unit 34 and the fuel tank 35 is provided along the opening of the recess 16 of the airframe 13 so as to be openable and closable.

  As shown in FIG. 3, the hose restricting body 32 includes a frame 51 that accommodates the flexible hose 31 within the restricted range, and a flexible hose formed in a part of the frame 51 within the frame 51. This is a rail guide provided with a hose insertion opening 52 for inserting 31 and mounting legs 53, 54, 55 provided integrally with the frame 51 and fixing the frame 51 to the machine body 13 side.

  As shown in FIG. 1 and FIG. 2, the frame 51 is elongated in the front-rear direction of the machine 13 along the opening of the recess 16 of the machine 13 and is formed in a substantially arc shape along the tank cover 45. The portion 52 is provided on the front end side of the frame body 51 disposed along the opening of the recess 16 and on the working device 17 side, and the mounting leg portion bends one end portion on the front end side of the frame body 51 downward. The first mounting leg 53 formed in this manner, and the other end of the frame 51 is bent downward with respect to the first mounting leg 53 via the hose insertion opening 52. A second mounting leg portion 54 and a third mounting leg portion 55 integrally provided on the rear end side of the frame 51 by welding or the like are provided. Although at least one third mounting leg 55 is provided, a plurality of third mounting legs 55 may be provided as necessary.

  As shown in FIGS. 2 and 3, the frame 51 and the mounting legs 53, 54, 55 are formed of a pipe material, and the first mounting leg 53 and the second mounting leg 54 include a pipe. Flat mounting plate portions 56 are formed by squeezing the front end portion of the material in the vertical direction, and bolt insertion holes 57 are formed in these mounting plate portions 56. The third attachment leg portion 55 is formed with a flat attachment plate portion 58 in which the tip end portion of the pipe material is crushed in the horizontal direction, and a bolt insertion hole 59 is formed in the attachment plate portion 58.

  As shown in FIG. 2, the first and second mounting legs 53 and 54 are side plate portions 61 erected from the pipe connection plate 38 on the control valve mounting side for pipe connection of the flexible hose 31. The third mounting leg portion 55 is fixed to the upper plate portion 44a of the firewall 44 by the bolt 63.

  Next, functions and effects of the embodiment shown in FIGS. 1 to 3 will be described.

  As shown in FIG. 2, the flexible hose 31 is inserted into the frame body 51 of the hose restricting body 32. At that time, relative to the hydraulic piping system including the flexible hose 31 already attached to the working device 17, the flexible hose 31 is relatively moved into the frame 51 from the hose insertion opening 52 of the hose restricting body 32 later. Since the frame 51 is mounted so as to be inserted and the mounting legs 53, 54, 55 are fixed to the machine body 13 side, there is no need to remove the flexible hose 31.

  Further, the first and second mounting legs 53 and 54 are easily formed by bending the frame 51, and the mounting legs 53 and 54 and the third mounting legs 55 are used to form a frame. The body 51 is fixed stably.

  The flexible hose 31 prevents the kink defect from occurring in the flexible hose 31 of the hydraulic piping system in the deep digging position with the working device 17 lowered to the maximum along the opening of the recess 16 of the machine body 13. When the working device 17 is rotated along the opening of the concave portion 16 of the airframe 13 to the maximum raised state shown in FIG. 1, the flexible hose 31 is shown in FIG. A slack portion 31a is generated.

  Even if such a slack portion 31a occurs in the flexible hose 31, the slack portion 31a moves in the side region of the working device 17 along the opening of the concave portion 16 of the machine body 13 by the hose restricting body 32. It is not sandwiched between the machine body 13 and the work device 17, and conversely, it does not interfere with members on the machine body 13 side located around the recess 16.

  That is, in the small turning type hydraulic excavator, when the working device 17 is in the maximum raised state, a large slack portion 31a is generated in the flexible hose 31, but the slack portion 31a of the flexible hose 31 is hose-restricted. The body 32 moves while being regulated by the side region of the work device 17 along the opening of the recess 16 of the machine body 13 and does not fall down to the work device 17 side, so that it is sandwiched between the machine body 13 and the work device 17 In addition, since it does not fall down to the tank cover 45 side, it does not interfere with the opened tank cover 45 as shown by a two-dot chain line in FIG.

  Further, since the first and second mounting leg portions 53 and 54 located through the hose insertion opening 52 are fixed to the side plate portion 61 of the pipe connection plate 38 that pipe-connects the flexible hose 31, the hose The insertion opening 52 is located at a place where the flexible hose 31 is most difficult to loosen, and there is no possibility that the slack portion 31a of the flexible hose 31 is detached from the hose insertion opening 52 to the outside of the frame 51.

1 is a perspective view showing an embodiment of a work machine according to the present invention. It is a perspective view which shows the internal structure of the recessed part periphery in a working machine same as the above. An example of the hose control body of a working machine same as the above is shown, (a) is a top view, (b) is a front view, (c) is a side view. It is a perspective view which shows the conventional working machine. It is a perspective view which shows the internal structure of the recessed part periphery in the conventional working machine.

Explanation of symbols

13 Airframe
16 recess
17 Work equipment
27 Boom cylinder as a hydraulic actuator
28 Stick cylinder as a hydraulic actuator
30 Bucket cylinder as a hydraulic actuator
31 Flexible hose
32 Hose regulator
34 Control valve unit
35 Fuel tank as tank
38 Piping connection plate
45 Tank cover
51 frame
52 Hose insertion opening
53, 54, 55 Mounting leg

Claims (2)

A fuselage with a recess having an opening;
A hydraulic actuator for operation is supported at least partially in the concave portion of the machine body, the base end portion is pivotally supported along the opening of the concave portion, and a flexible hose for supplying hydraulic oil to the hydraulic actuator is included. A working device with a hydraulic piping system;
A hose restricting body for restricting the flexible hose of the working device to a side region of the working device along the opening of the recess of the airframe;
The hose restricting body includes a frame that accommodates the flexible hose within the restricted range;
A hose insertion opening formed in a part of the frame and for inserting a flexible hose into the frame;
A mounting leg portion that is provided integrally with the frame body and fixes the frame body to the machine body side;
The opening of the concave part of the fuselage is formed elongated in the longitudinal direction of the fuselage,
The hose insertion opening is provided on the front end side of the frame disposed along the opening of the recess and on the working device side,
The mounting leg is
A first mounting leg portion formed by bending one end portion of the front end side of the frame body downward;
A second mounting leg formed by bending the other end of the frame body downward through the hose insertion opening with respect to the first mounting leg;
Comprising at least one third mounting leg provided integrally on the rear end side of the frame,
The first and second attachment legs you characterized in that the flexible hose is fixed to the pipe connection plate for pipe connection work machine. The fuselage and work equipment form a small swivel excavator,
A control valve unit for controlling the hydraulic actuator and a tank cover covering the tank are provided to be openable and closable along the opening of the concave portion of the airframe.
The work machine according to claim 1, wherein:

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